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Note 2 - Common Stock Outstanding and Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
For the Three Months Ended
    
For the Nine Months Ended
  
(Amounts in thousands, except per share information)
  
September 30,
    
September 30,
  
Earnings Per Share
  
2019
    
2018
    
2019
    
2018
  
Numerators:
                                
Net income
   $
4,642
     $
4,032
     $
10,592
     $
10,891
  
Denominators:
                                
Weighted average number of common shares outstanding - basic
(1)
    
18,130
      
16,252
      
17,918
      
16,242
  
Effect of potentially dilutive common shares
(2)
    
66
      
90
      
63
      
85
  
Weighted average number of common shares outstanding - diluted
    
18,196
      
16,342
      
17,981
      
16,327
  
Earnings per common share:
                                
Basic
   $
0.26
     $
0.25
     $
0.59
     $
0.67
  
Diluted
   $
0.26
     $
0.25
     $
0.59
     $
0.67
  
Anti-dilutive options not included in diluted earnings per share calculation
    
—
      
—
      
—
      
—
  
Anti-dilutive restricted shares not included in diluted earnings per share calculation
    
—
      
—
      
—
      
—